\xcf0*12345\x0c\xcd\x03\x808\x0d\xe6\x02=\x81O\xcb\x99 \xbe \xff \xeev
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
ORG 00000H RST 8 ;0000 CF . JR NC,$+44 ;0001 30 2A 0 * LD SP,03332H ;0003 31 32 33 1 2 3 INC (HL) ;0006 34 4 DEC (HL) ;0007 35 5 INC C ;0008 0C . CALL 08003H ;0009 CD 03 80 . . . JR C,$+15 ;000C 38 0D 8 . AND 002H ;000E E6 02 . . DEC A ;0010 3D = ADD A,C ;0011 81 . LD C,A ;0012 4F O RES 3,C ;0013 CB 99 . . LD A,(BC) ;0015 0A . CP (HL) ;0016 BE . JR NZ,$+1 ;0017 20 FF . JR NZ,$-16 ;0019 20 EE . HALT ;001B 76 V